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How Do We Know It Is Alive? is a free printable Kindergarten science worksheet on using needs, growth and young as evidence that something is alive, aligned to NGSS performance expectation K-LS1-1. It prints 8 questions with an answer key on its own sheet of paper, in 25 versions that each ask different questions, so no two students in the class work from the same page. Print it from the browser or download it as a PDF — no account, no email.

Set 18 of 25 · the same problems every time you open this link.

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Set 1 has all 25 in a single PDF. All 25 sets ask different questions.

How Do We Know It Is Alive?

K-LS1-1

NameDate

Circle the best answer.

1.A ladybird lays eggs that hatch into baby ladybirds. What does that show?
  • A.Eggs never hatch
  • B.Ladybirds are toys
  • C.Living things make young like themselves
2.Which of these can grow and have young?
  • A.A rock
  • B.A rabbit
  • C.A teddy bear
3.How is a real fish different from a toy fish?
  • A.The real fish is shinier
  • B.The real fish needs water, food and air to stay alive
  • C.The toy fish is bigger
4.A toy robot moves and beeps. Is it alive?
  • A.No, it does not need food, water or air, and it cannot grow
  • B.Yes, because it moves
  • C.Yes, because it makes a noise
5.A tree grows new leaves every spring. What does that show?
  • A.It is not alive
  • B.It is a building
  • C.It is alive and growing
6.A cloud moves across the sky and changes shape. Is it alive?
  • A.Yes, because it moves
  • B.No, it does not eat, breathe or have young
  • C.Yes, because it changes shape
7.A daisy stays in one place all its life. Is it alive?
  • A.No, because it is small
  • B.No, because it stays still
  • C.Yes, it needs water, air and light, and it grows
8.A kitten drinks, eats and grows bigger. What does that tell you?
  • A.It is alive
  • B.It is not alive
  • C.It is a toy

LessonPrint · K-LS1-1 · Set 18 · free to copy for classroom use

Answer key — How Do We Know It Is Alive?

Set 18. Prints on its own sheet.

  1. 1.Living things make young like themselves
  2. 2.A rabbit
  3. 3.The real fish needs water, food and air to stay alive
  4. 4.No, it does not need food, water or air, and it cannot grow
  5. 5.It is alive and growing
  6. 6.No, it does not eat, breathe or have young
  7. 7.Yes, it needs water, air and light, and it grows
  8. 8.It is alive

Last reviewed 2026-09-05. Aligned to K-LS1-1 of the Next Generation Science Standards.